Confirmation bias

Confirmation bias is the tendency to perceive what fits a prior belief and miss what challenges it. In the case against Jacob Barber, the concept does not settle whether Andrew Barber misunderstood his son; instead, it exposes the competing stories Andrew and Neal Logiudice tell about what a father could know, and what he might have chosen not to face.

The Concept in Testimony

During cross-examination, Andrew describes confirmation bias as a process of seeing what confirms preconceived ideas and not seeing what conflicts with them. He compares it to the way parents may see their children as they wish to see them. Asked whether a person can fail to see unwelcome facts without consciously choosing to ignore them, Andrew distinguishes unconscious inattention from deliberate denial: a person simply does not see.

Logiudice presses the implication. For Andrew’s blindness to count as confirmation bias, he argues, Andrew must genuinely have believed Jacob was an ordinary boy, not someone whose character might be troubling. The exchange shifts the issue from the definition of a cognitive tendency to Andrew’s particular state of knowledge: whether his belief in Jacob’s normality was sincere, and whether it could coexist with earlier reasons for suspicion.

A Father’s Knowledge Under Challenge

Logiudice uses Andrew’s family history to dispute his account. He insists that Andrew could not have forgotten who his father was or the possibility that Jacob might resemble his grandfather. When Andrew calls the matter personal, Logiudice answers that Andrew had never truly regarded it as separate from his son’s future. His repeated accusation that Andrew knew turns confirmation bias into a question of responsibility, not merely perception.

The exchange leaves a tension unresolved. Andrew’s account allows for sincere love and unconscious limitation: closeness can make a parent see what he hopes to see. Logiudice’s account makes that same closeness insufficient as an excuse, because Andrew’s family history supposedly made the danger imaginable in advance. The concept thus becomes a point of conflict over whether Andrew was unaware, self-protectively blind, or already alert to the very possibility he denies.

The Idea Beyond the Courtroom

The same dispute surfaces when Laurie challenges Andrew’s response to the family’s assessment of Jacob. Andrew dismisses its characterizations as ordinary descriptions that could fit any teenager; Laurie counters that his determination to preserve the idea of a normal family leads him to close his eyes to whatever does not fit. Her accusation echoes the courtroom argument, but places the bias within the marriage as well as the testimony: Andrew’s picture of Jacob is tied to his picture of the family.

The novel also presents confirmation bias as a broader risk in investigation. Early interviews with McCormick students give Andrew and Paul Duffy the impression that classmates are concealing what they know about Benjamin Rifkin. The students deny even knowing Benjamin, despite investigators’ belief that he had friends. Their evasions raise suspicion, but the episode also shows how an investigator’s interpretation of behavior can shape what that behavior appears to prove. A manner that seems unconvincing or suspicious is not, by itself, a full account of what a witness knows.

Suspicion and the Need for Evidence

Andrew’s pursuit of Leonard Patz demonstrates how conviction can persist when confirming evidence is weak. By August, he has followed Patz for weeks, partly because he regards information from Matthew Magrath as compelling but knows it would not persuade a jury. He hopes surveillance will produce harder evidence, yet Patz’s routine offers nothing especially suspicious. Rather than loosening Andrew’s belief, the absence of incriminating activity intensifies his certainty: he interprets Patz’s uneventful life as concealment and becomes increasingly consumed by the possibility that Jacob will be blamed instead.

That pattern gives the concept its double edge. Andrew may suspect that others are fitting facts to a preferred account, while his own pursuit of Patz shows how a preferred suspect can absorb evidence that does not confirm the suspicion. The narrative does not turn the term into a simple diagnosis or proof of guilt. It uses the disagreement to show how parental love, family history, investigative conviction, and the interpretation of testimony can all affect what people believe they see—and what they regard as evidence that they were right.